The prescription weight-loss drug Mounjaro also nicknamed the “slim shot,” has gained attention in recent years for its effectiveness but is not a health supplement and can carry serious side effects. Experts warn it should only be used under medical supervision. However, a recent performance by Japanese idol groups TOKYOPARALELL and Freak Out X shocked fans when TOKYOPARALELL member Tsukishima RIRARI reportedly injected the drug directly into the stomach of Freak Out X member Yui IROHA during a live show, sparking widespread online criticism.
The bizarre incident occurred on March 12 during RIRARI’s birthday celebration, with both groups performing together. As IROHA stepped forward, he handed a 5mg Mounjaro injection pen to RIRARI, asking her to administer it directly into his “love handles” while continuing to sing. Video footage shows all members laughing, including RIRARI and IROHA, who even shared the clip on social media.
Despite the apparent humour, Japanese netizens condemned the act. Many noted that Mounjaro is a prescription-only drug, and having a non-professional administer it violates Japan’s Medical Practitioners Act and could pose serious health risks. Legal experts point out that while individuals with a prescription can self-administer, giving it to someone else is illegal, punishable by up to three years in prison or fines of up to ¥1 million.
The controversy was intensified by IROHA’s past. Social media users resurfaced allegations that he had sexual relations with a minor, reportedly a 17-year-old girl, and pressured her into unsafe sexual activity.
On March 14, IROHA issued a public apology on Twitter: “I am deeply sorry for the recent incident circulating on social media that caused concern and discomfort. I will take this matter seriously, reflect on my actions, and work from the ground up to regain everyone’s trust in future activities.”
The incident has sparked a broader debate over extreme behaviours in Japan’s underground idol scene, with critics calling for stricter regulations to prevent dangerous acts from occurring on stage.
